Oman Air 737 Max cancellation ?

Oman Air's #omanair next 737 Max frame due, A4O-ML (LN 7707), has seemingly been painted in full Boeing company 'light' livery from my observations.  However, it is still sporting Oman Air winglets.  I currently have no answers for why this frame is painted in the Boeing company livery when the 737-8 test program has long since been completed.  It is not the former test frame #3 LN 5728 N8703J which was in the same livery and also at BFI, as this has been in full Southwest Airlines livery since the summer.




Photo credit: Jeff Berry